I need some spells to ward the room I plan to use to practice my craft in. Any spells to compel people to stay away from that room, if possible, and spells to ward off evil spirits and negative energy.

I burn dragon's blood incense or Frankincense and smudge the room from top to bottom, including the closet. If you want to make the ward a little stronger, you can make some holy water (a few sprinkles of salt in a cup of water and ask the god and goddess to bless the mix will do). You do the same thing as what you would do with the incense - sprinkle some on each wall, including the closet.

If you want to do a third warding of the room, ringing a bell in each corner of the room will suffice. Normally I don't bother and just use the incense :) When setting up the ward, I envision a two way mirror. I can see out, but no one outside will be able to see anything except for a reflection of themselves.